Exterminator



p 1941- o. HOELSCHER EXTERMINA'I'OR Filed vJan. 8, 1941 2 Sheets-Sheet l 3nventor Sept. 23; 1941.

O. HOELSCHER EXTERMINATOR Filed Jan. 8 1941 2 Sheets-Sheet 2 0/1 266 5c er Patented Sept. 23, 1941 UNITED STATES PATENT OFFICE 11 Claims.

device which handles insecticide more easily, economically, effectively and efficiently than devices of a similar type at present well known and in use.

Another object is to provide a new and im proved exterminating device which is portable and compact and also adapted for long periods of uninterrupted operation.

Another object is to provide a new and improved exterminating device which is particularly adapted for handling insecticide in powdered form and which is so designed and constructed as to overcome in its operation many of the faults previously found with devices of a similar nature.

Another object is to provide a new and improved exterminating device wherein the dischargeable mixture of air and insecticide is more readily and easily regulated than heretofore, and wherein, also, control of the device proper is accomplished with similar ease and readiness.

Other objects and advantages of the invention will become readily apparent from a reference to the following specification taken in conjunction with the accompanying drawings of which;

there are two (2) sheets and wherein:

Figure 1 is an elevational view of the device, same being partially broken away and in section to illustrate more clearly some of the details of the invention;

Fig. 2 is a side elevation; and

Figs. 3, 4 and 5 are sectional views taken along the lines 3-3, 4-4 and 5-5, respectively, in Fig. 2.

In order that the apparatus herein disclosed be portable, a standard hand truck, generally indicated at H1, is employed, and to said truck there is secured an insecticide container, generally indicated at !2. Truck it also has secured thereto a standard motor-pump set, generally indicated at l4, the pump of which is of the impeller type, and also secured to said truck is a bus box, generally indicated at it.

Container l2, which is supported by truck Ill so as to be in an upright position during use of the apparatus'is provided at its upper end with an opening which is closed and sealed by means of a removable cover 18, said opening preferably providing the means whereby said container may be charged with a quantity of powdered insecticide. Cover l8 fixedly supports a plurality of tubes or conduits 20, 22, 2d and 26 all of which extend above and below said cover, said conduit 2E1 extending almost to the bottom of container 12 and said conduits 22, 24 and 26 extending to a level slightly thereabove. It will be noted that conduits 21], 24 and 26 are perforated along substantially their entire lengths, whereas conduit 22 is imperforate. It will also be noted that the lower end of conduit 20 is open, whereas the lower ends of conduits 22, 24 and 26 are interconnected for intercommunication by means of horizontally arranged tubes or conduits 28 and 39. Cover la is also provided with an opening which is closable by means of a removable cap 32; and through this opening it is possible for means such as a measuring rod (not shown) to be inserted for approximating the amount of insecticide residing at any time within container l2.

The upper end of perforated conduit 29 is 0peratively connected to the discharge or outlet side of a standard, manually operable flow con trol valve 34 the inlet side of which valve is 0peratively connected, selectively separably, to the lower end of a preferably flexible tube or conduit 36. The upper end of conduit 36 is operatively connected, selectively separably, to the lower end of a nipple 38 which is preferably formed at its upper end with an angular surface 48 extending into a fitting 42 attached, preferably removably, to and communicated with the discharge or high pressure side of pump 4% of motor-pump set Hi, said surface facing the flow of air from said pump so as to be capable of directing a substantial portion of the total thereof into container 12 through said nipple, said conduit, valve 34 and the lower open end and perforations of conduit 20, said valve, of course, being operable for controlling said flow. This air which enters container l2 through the open lower end of conduit 2!] and through the perforations therein residing below the level of the insecticide within said container disturbs and agitates said insecticide and places at least a substantial portion thereof in suspension for easy removal from said container in a manner which is to be set forth presently.

The upper end of imperforate conduit 22, see Fig. 5, is operatively connected to an inlet 46 leading into a chamber 48 of a manually operable flow control Valve, generally indicated at 50, there being another inlet 52 leading into said chamber to which a tube 5 having perforations 5% formed therein and open to the atmosphere, is connected. Tube 54 is provided at its outer end with a cap 58 which threadedly receives a manually operable valve stem 60 which is cooperable with perforations 56 for selectively opening or closing some or all thereof to chamber 46. Chamber 48, in addition to its two inlets 46 and 52, is formed with an outlet 62 to which is operatively connected, selectively separably, one end of a preferably flexible tube or conduit 64 the opposite end of which is operatively connected, selectively separably, to the suction or inlet side of pump 44 of motor-pump set M. Therefore, the suction created by pump within container l2 through the perforations in conduits 24 and 26 and is selectively controlled by manipulation of stem 60 of valve 56, th result being that a mixture of air and suspended 44 is established 7,

and the opposite end of said conduit 88 being connected to the other side of said motor. Aforementioned conduit 82 is provided electrically between its ends with a switch 92 so that motor 96 may be turned on or off While switch 80 remains closed, and said conduit is made particularly long so that the operator may manipulate said switch 92 remotely from the remainder of the apparatus similarly as he can hose 6668. In other words, it is clear from the foregoing that, with fuses properly in their sockets 12 and M, switch, 80 closed and the apparatus positioned in one part of a room, the

operator may play hose 66-68 with one hand particles of insecticide is drawn through said per forations into said conduits, thence into conduits 22 and 64 and outwardly through said pump and.

a length of hose 66 which is secured to fitting 42 ahead of nipple 38 and preferably provided with a nozzle 68 of any desired design.

Theouter end of each of'the conduits 24 and 26 ispreferably provided with a removable cap 76 so that either or both of said, conduits may or may not be opened to the atmosphere. It is seen, therefore, that the suctiondeveloping side of pump 44 is communicable with the atmosphere externally of container l2 through perforations 56 in valve 56 and through the closable, open upper ends of conduits 24 and 26, and that said side is communicated with the interior of said container through those perforations in said on remote parts of said room while at the same time and without returning to said apparatus 'control motor 66 by manipulation of switch 62 with the other hand.

Since much of the exterminating work which the apparatus will be called upon to perform will be in rooms having poor lighting facilities, it is preferable that said apparatus be provided with at least one source of light at said apparatus itself and another operable remotely therefrom, and it is further desired that these lights be operable independently of the operation of the motor-pump set 14. To attain these ends, one end of an electrical conduit 94 is connected to that terminal of fuse conduits which reside at least above the level of the insecticide. And, it has been found that the desired richness of the air-insecticide mixture which is to be ejected through nozzle 68 may be easily and accurately obtained and controlled by manipulating valves 50 and 34 in whatever manner is necessary and having either or both of the caps 16 on or off the conduits 24 and 26, whichever will produce the desired result. 7 a

' The unitary structure consisting of valves 34 and 56, cover IB and conduits 26, 22, 24, 26, 28 and,36 may be readily removed bodily from container l2 and motor-pump set l4 by releasing either end of each of the conduits 36 and 64'from its separable anchorage and unfastening the means interconnecting said cover and container, whereby said structure may be easily cleaned and/or repaired, if necessary.

Bus box 16, which is carried on truck ID for portability therewith, is equipped with a pair of fuse sockets l2 and 14 one terminal of which fuse socket 12 is connectedto one side 16 of a source of electrical energy and one terminal of which fuse socket I4 is connected to the other side 18 of said source. Bus box I6 is also equipped with a single throw-double pole switch 80 one terminal of which is connected to one end of an electrical conduit 82 and the other terminal of which is connected to one end of another electrical con duit B4, the-opposite end of said conduit 82 being connected to the other terminal of fuse socket 72 and the opposite end of said conduit 84 being connected to the other terminal of fuse socket 14. The contact for one of the two sides of switch so isconnected to one end of an electrical conduit 86 and the contact for the other of saidsides of said switch is connected to one end of another electrical conduit 88, the opposite end of said conduit 86 being connected to one side of motor 66 of motor-pump set [4 socket 12 to which conduit 82 is connected, and one end of another electrical conduit 66 is connected to that terminal of fuse socket 14 towhich conduit 84 is connected, the opposite end of said conduit 94 being connected to one terminal of a socket 98 and the opposite end of said conduit 96 being connected to the other terminal of said latter socket, said latter socket being adapted for receiving a lamp (not shown) for local illumination or one end of an extension cord (not shown) for remote illumination. A second socket I0!) is connected across conduits 94 and 96 in parallel with socket 98 and is adapted, similarly as is said socket 98, forreceiving either a lamp (not shown) or an end of an extension cord (not shown). Obviously, because of sockets 98 and I!!!) being in parallel, the energization of either is independent of the other so that one may be energized without the other or both may be simultaneously energized. A switch I62 is connected in series in conduit 94, and 'it is obvious from the foregoing that the circuit including said switch may be opened or closed thereby regardless of the open or closed condition of the circuit which Bus box I6 is provided with the usual door I04.

Although the invention has been described with some detail it is to be understood that such description is for the purpose of illustration only and is not to be taken as definitive of the limits of the inventive idea. The right'is reserved to make such changes in the details of construction and arrangement of parts as will fall withinthe purview of the attached claims.

What I claim is: v

1. In an exterminating device, a sealed container for supporting a quantity of powdered insecticide therewithin, a pair of conduits extending into said container and being in communication with the interior thereof and interconnected within said interior, a third conduit extending into said container and also being in communication with said interior, pump means having a pressure-developing section in communication with said third conduit and a suction-developing section in communication with said pair of conduits, and outlet means for said pump means.

2. In an exterminating device, a sealed container for supporting a quantity of powdered insecticide therewithin, a pair of conduits extending into said container from without the latter and being in communication with the interior thereof and interconnected within said interior, another pair of conduits extending into said container from Without the latter each of which is in communication with said interior and one of which is connected to said first pair of conduits, pump means having a pressure-developing section in communication with the other conduit of said second pair and a suction-developing section in communication with said one conduit of said second pair, and outlet means for said pump means.

3. In an exterminating device, a sealed container for supporting a quantity of powdered insecticide therewithin, a pair of conduits extending into said container and being in communication with the interior thereof and interconnected within said interior, a third conduit extending into said container and also being in communication with said interior, pump means having a pressure-developing section in communication with said third conduit and a suction-developing section in communication with said pair of conduits, outlet means for said pump means, and flow control means associated with said conduits.

4. In an exterininating device, a sealed container for supporting a quantity of powdered insecticide therewithin, a pair of conduits extending into said container from without the latter and being in communication with the interior thereof and interconnected within said interior, another pair of conduits extending into said container from without the latter each of which is in communication with said interior and one of which is connected to said first pair of conduits, pump means having a pressure-developing section in communication with the other conduit of said second pair and a suction-developing section in communication with said one conduit of said second pair, outlet means for said pump means, and flow control means associated with said conduits.

5. In an exterminating device, a sealed container for supporting a quantity of powdered insecticide therewithin, a pair of conduits extending into said container and being in communication with the interior thereof and interconnected within said interior, a third conduit extending into said container and also being in communication with said interior, electrically operated pump means having a pressure-developing section in communication with said third conduit and a suction-developing section in communication with said pair of conduits, outlet means for said pump means, and remote control means for and in circuit with said pump means.

6. In an exterminating device, a sealed container for supporting a quantity of powdered insecticide therewithin, a pair of conduits extending into said container and being in communication with the interior thereof, electrically operated pump means having a pressure-developing section in communication with one of said conduits and a section-developing section in communication with the other of said conduits, outlet means for said pump means, remote. control means for and in circuit with said pump means, and illuminating means in parallel with said pump means for being energized and de-energized independently of the operation of said control means.

7. In an exterminating device, a sealed container for supporting a quantity of powdered insecticide therewithin, a pair of conduits extending into said container and being in communication with the interior thereof, pump means having a pressure-developing section in communication with one of said conduits and a suction-developing section in communication with the other of said conduits, outlet means for said pump means, and a third conduit having an upper end communicable with the atmosphere externally of said container and. a lower end extending into said container and being in communication with said interior and with said other conduit.

8. In an exterminating device, a sealed container for supporting a quantity of powdered insecticide therewithin, a pair of conduits extending into said container and being in com munication with the interior thereof, pump means having a pressure-developing section in communication with one of said conduits and a suction-developing section in communication with the other of said conduits, outlet means for said pump means, a third conduit having an upper end open to the atmosphere externally of said container and a lower end extending into said container and being in communication with said interior and with said other conduit, and means selectively operable for at least partially closing said upper end.

9. In an exterminating device, a sealed container for supporting a quantity of powdered insecticide therewithin, a pair of conduits extending into said container and being in communication with the interior thereof, pump means having a pressure-developing section in communication with one of said conduits and a suction-developing section in communication with the other of said conduits, outlet means for said pump means, a third conduit having an upper end open to the atmosphere externally of said container and a lower end extending into said container and being in communication with said interior and with said other conduit, means selectively operable for at least partially closing said upper end, and flow control means arranged in each of said conduits of said pair. I

10. In an exterminating device, a sealed container for supporting a quantity of powdered inscctticide therewithin, a pair of conduits extending into said container and being in communication with the interior thereof and interconnected within said interior, a third conduit extending into said container and also being in communication with said interior, pump means having a pressure-developing section in communication with said third conduit and a suction-developing section in communication with said pair of conduits, outlet means for said pump means, and a closable opening formed in said container through which measuring means may be extended for determining at will the quantity of insecticide residing therewithin.

11, In an exterminating device, a sealed container for supporting a quantity of powdered insecticide therewithin, a pair of conduits extending into said container and being in communication with the interior thereof, the lower tion-developing section in communication with the'other of said conduits, outlet means for said .pump means, and a third conduit having an upper end communicable with the atmosphere externaliy of said container and a lower end extending into said container and being in communication with said interior and with said other 5 conduit.

OTTO HOELSCHER. 

